Pipe-wrench.



H. ST. e. TUCKER.-

PIPE WRENCH. APPLICATION FILED SEPT. 25, 1911.

Patented Apr. 23, 1912v [N VE N T 01? 2&4 I

A tiomey 4 SIP PIPE-WRENCH.

To.all whom it may concern 7 -'Be 'i'tl'mown that I, HARRY Sr. G. TUCKER, a-citizenof the United States, residing at Viest-Raligh, in the county of lVake and staterof'North Carolina, have invented certain new and useful Improvements in Pipeshankieirds connected as follows, one end proved construction and arrangement of pivoted directly to a long-handled operating lever and-the other end to a link which in turn is pivotally connected to the handle lever, there being a spring to hold the jaws in'normal gripping relation,

My invention consists in a new and impipe wrench of the general type described,

wherebyfthe objects of my invent-ion are attained in a simple and practical way, as willibehereinafter more fully described with reference to the'dr aw 'ing, in which Figure 1. is a side View of my improved pipe wrench'in its normal position of rest. and showing in dotted lines the movementof the parts in opening the jaws to apply them to the pipe, and Fig. 2. is a fragmental view showing a slight-modification of the jaws.

In the drawing A, 'A and B, B are two crossed jaw levers of substantially the same shape, which are pivot-ally connected in -the middle to each other by means of a' fulcrum pin or rivet 1. The freeends of these jaw levers are fashioned into gripping jaws A, ll, whose inner opposite faces are serrated with teeth, the. inclination of thevteeth on one jaw being reverse to the' inclination of those on the other, so'as to cause them tobitc into the smooth periphery of the pipe when turned in the direction of the circular arrow. The rear or shank members A B o? the jaw levers are extended substantially parallel toeach other. but the one B is made considerably shorter-than Specification of Letters Patent.

I the other one A.

shank is pivoted directly the end of a long handle-leverC, the connection being made a loose one by a fulcrum pin or rivet 2 which permits a free flexion of the joint. To the end of the other and longer shank A is pivotally connected a transverse link bar I).

This link bar is connected at one end to the shank A by a fulcrum pin or rivet 4, while its other end is similarly connected at 3 to the long handle-lever C. This connection at 3 is made a short but invariable distance away from the end of the shortshank-B 'so that the link bar D normally stands at or about at right angles to the long handlelever C and the shank ends A B, while the handle-lever C is substantially in alinement with the shank B.

At a point on the shank t between the jaw fulcrum- 1 and the link pivot l'is anchored a flat'spring E. This is secured at i one end to the jaw shank A by being curled around a screw 6 firmly set into the side' of the shank and is held by a back stop screw or lug 5, so that the free end bears against the inner edge of the link bar I) at a point about opposite the fulcrum pin 3 connecting the link bar and the handle-lever. The tendency of the spring is to throw the fulcrum Patented Apr. 23,1912. Application filed September 2? 1911. Serial No. 651,180l

T o the end of this shorter 3 away from fulcrum 2 and draw the ful Clllllli'2 toward fulcrum 4 in seeking to establish a straight line between the centers 1, 2, 3,'and thus causes the jaws A. B to have a normal initial grip tronrthe action of said spring, so as to instantly fasten the serrated jaws upon the pipe. The relative lengths ofthe shanks A B and their connect-ion with and relation-to the handle lever and link bar are highly important, as is also the posit-ionand cooperative relation of the spring. By making the lever shank-B shorter than A the normal position of the I handle lever C is one in alinement with said shank B which makes the tool a straight tool capable of being operated to much greater ad antage and with a greater power (if-leverage since the joint 3 becomes the center of a toggle l, 2, 3. By making the shank ll shorter than l\ also the gripping spring l) is arranged in transverse relation to the tool and is completely housed and protected against accidentalabrasion, dislocation and breakage,for it extends inwardly from its pointof anchorage and lies in the plane of the link bar D along its edge and in the recess left between the ends of the link bar and the end of the shank B Furthermore the position and action of this spring makes a more efficient straightening of the centers 1, 2, 3, and a more sensitive initial grip on the pipe. It will also be seen that the handle-lever, C, lies in the same plane the longer shank end, A, and this permits the handle lever C, to stop against the end of the shank, A. when the handle lever is deflected to its extreme position, as indicated in dotted lines, and this prevents the handle lever from being doubled around into an inconvenient position. and limits its range of movement.

In carrying out my invention I would have it understood that the form and construction of the terminal. aws A B is unimportant. They may be of the form shown in Fig. 1, or may be of the alligator pattern shown in Fig. 2, or may take any other shape without departing from the principle of my invention. Another advantage of my pipe wrench is its great cheapness. It will be seen that all of the parts or the wrench may he cheaply stamped out of plate metal of uniform thickness and after the finishing of the gripping jaws the parts are loosely riveted together in a very cheap and expeditious way, to form an extremely simple and practical tool.

I claim.

1. A tool of the kind. described, comprising two crossed jaw members fulcrumed to each other in the middle and having their shank ends extended substantially parallel to each other and made of different lengths, a relatively long handle lever pivotally connected directly to the end of the shorter shank and in substantial alinement therewith, a transverse link bar pivot-ally connected at one end to the end of the longer shank, and pivotally connected at the other end to the handle lever at a point beyond the levers connection with the short shank, said handle lever and longer shank being in the same plane to cause the end of the longer shank to act as a stop to the handle lever.

52. A tool of the kind described, comprising two crossed jaw members fulcrumcd to each other in the middle and having their shank ends extended substantially parallel to each other and made of different lengths, a relatively long handle-lever pivotall y con nected directly to the end oi. the shorter shank and in substantial alinement thercwith, a transverse link bar pivotally con nected at one end to the end of the longer shank and pivotally connected at the other end to the handle lever at a point beyond the levers connection with the short shank to form a normally straight tool and a spring connected to the longer shank member and extending inwardly in transverse relation to the tool and bearing outwardly against the link bar and lying within the plane of the same bet-ween the link bar and the end of the short shank and housed and protected thereby.

3. A tool of the kind described, coinpris- 7 ing two crossed ja w members tulcrumed to each other in the middle and having their shank ends made of diflicrent lengths, a relatively long handle lever pivotally connected directly to the end of the shorter shank, a 7

transverse link bar pivotally connected atone end to the end of the longer shank and pivotally connected at the other end to the handle lever at a point beyond the levcrs connection with the short shank, and a HARRY s1. e. TUCKER. Witnesses:

Gnonon SUMMER, J12, H. H. PECKHAM. 

